* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  background-color: #f5f5f5;
}

#app {
  width: 100%;
  height: 100%;
}